Having an 'ecosystem' or products with Office 365 and CRM Online was another key reason the bank has moved to the cloud.
"Being able to provide something that is inherently integration and nicely knitted together -- you are able to give users something that can push on productivity and help them in mobile and in the office roles," he said.
Aitken said the bank has plans to rollout out cloud-based collaboration tool, Microsoft Yammer and Azure Machine Learning, a cloud-based predictive analytics service for big data mining and artificial intelligence.
"A unified service desk together with Yammer and SharePoint will provide us with some good collaboration and workflow throughout the organisation," he said.
Aitken added the bank is still 'risk-averse' to moving services to the public cloud despite 'cloud-first' being one of its guiding principles.
He admitted that a 'number of years and a number of changes' would need to occur before the company would move its core banking system into the public cloud.
"Core banking is probably in many respects a sacred cow -- other stuff, unified communications, telephony video, workflow, loans origination I can certainly see following the same path as CRM and Office 365," he said.
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